/**
 * This file is part of Port@l
 * Port@l 3.0 - Portal Engine and Management System
 * Copyright (C) 2010  Isotrol, SA.  http://www.isotrol.com
 *
 * Port@l is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Port@l is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Port@l.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.isotrol.impe3.api.support;


import com.isotrol.impe3.api.Pagination;


/**
 * Pagination support methods.
 * @author Andres Rodriguez.
 */
public final class PaginationSupport {
	/** Not instantiable. */
	private PaginationSupport() {
		throw new AssertionError();
	}

	public static Pagination load(Pagination injected, WithPageSize config, int defaultSize) {
		final int size;
		if (config != null && config.pageSize() != null) {
			size = config.pageSize().intValue();
		} else {
			size = defaultSize;
		}
		if (injected != null) {
			if (injected.getSize() == null) {
				injected = injected.setSize(size);
			}
		} else {
			injected = new Pagination(size, null);
		}
		return injected;
	}
}
